Polarization insensitive terahertz metamaterial absorber

Grant, J. , Ma, J., Saha, S., Lok, L.B., Khalid, A. and Cumming, D.R.S. (2011) Polarization insensitive terahertz metamaterial absorber. Optics Letters, 36(8), pp. 1524-1526. (doi:10.1364/OL.36.001524)

Grant, J. , Ma, J., Saha, S., Lok, L.B., Khalid, A. and Cumming, D.R.S. (2011) Polarization insensitive terahertz metamaterial absorber. Optics Letters, 36(8), pp. 1524-1526. (doi:10.1364/OL.36.001524)

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Abstract

We present the simulation, implementation, and measurement of a polarization insensitive resonant metamaterial absorber in the terahertz region. The device consists of a metal/dielectric-spacer/metal structure allowing us to maximize absorption by varying the dielectric material and thickness and, hence, the effective electrical permittivity and magnetic permeability. Experimental absorption of 77% and 65% at 2.12 THz (in the operating frequency range of terahertz quantum cascade lasers) is observed for a spacer of polyimide or silicon dioxide respectively. These metamaterials are promising candidates as absorbing elements for thermally based terahertz imaging.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Lok, Dr Lai Bun and Saha, Dr Shimul and Khalid, Dr Ata-ul-Habib and Grant, Dr James and Cumming, Professor David
Authors: Grant, J., Ma, J., Saha, S., Lok, L.B., Khalid, A., and Cumming, D.R.S.
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Optics Letters
ISSN:0146-9592

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